CVE-2026-12436

HIGH 8.4 ALL-YEARS

Published 2026-07-29 · Last modified 2026-07-31 · GitLab · NVD: Analyzed

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.0 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an authenticated user to modify CI/CD configuration belonging to another user due to improper validation of user-supplied attributes when processing pipeline schedule inputs.

ELEVATED IMPACT

Severe if exploited (CVSS 8.4), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.5%chance of exploitation in 30 days · 40th percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable no

Impact if exploited

8.4CVSS 3.1 · HIGH · CNA

ConfidentialityHigh
IntegrityHigh
AvailabilityLow

What an attacker needs

✓Access: Reachable over the network — no local access needed
⚠Privileges: Requires a low-privilege account
✓User interaction: No user interaction needed
⚠Complexity: Needs a race window or specific setup

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot: 2026-10-26T04:59:11.116Z

Affected

Vendors Gitlab

Products Gitlab

Weakness (CWE)

CWE-915: : Improperly Controlled Modification of Dynamically-Determined Object Attributes

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L

References and research data (JSON)

Known Affected Software Configurations

Vendor	Product	Version range
Gitlab	Gitlab	≥ 18.0.0 and < 19.0.5
Gitlab	Gitlab	≥ 18.0.0 and < 19.0.5
Gitlab	Gitlab	≥ 19.1.0 and < 19.1.3
Gitlab	Gitlab	≥ 19.1.0 and < 19.1.3
Gitlab	Gitlab	19.2.0
Gitlab	Gitlab	19.2.0

All CVSS metrics

HIGH 8.4 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
HIGH 8.4 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L

References

Exploit-tagged references (not proof of a PoC)

https://hackerone.com/reports/3800511 technical-descriptionexploitpermissions-requiredPermissions RequiredCVE record · GitLab · Updated 2026-07-29T19:00:36.048Z
NVD · CVE-2026-12436 · Updated 2026-08-03T13:42:46.800

Advisories

https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-2-1-released/ Release NotesVendor AdvisoryCVE record · GitLab · Updated 2026-07-29T19:00:36.048Z
NVD · CVE-2026-12436 · Updated 2026-08-03T13:42:46.800
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-50482 ADVISORYEUVD · EUVD-2026-50482

Technical & other

https://gitlab.com/gitlab-org/gitlab/-/work_items/603223 Broken LinkCVE record · GitLab · Updated 2026-07-29T19:00:36.048Z
NVD · CVE-2026-12436 · Updated 2026-08-03T13:42:46.800

Sources: NVD · CVE.org · All sources and attribution · EPSS